(19)
(11) EP 0 267 941 A1

(12)

(43) Date of publication:
25.05.1988 Bulletin 1988/21

(21) Application number: 87903492.0

(22) Date of filing: 16.04.1987
(51) International Patent Classification (IPC): 
C30B 15/ 00( . )
C30B 29/ 32( . )
C30B 29/ 30( . )
(86) International application number:
PCT/US1987/000854
(87) International publication number:
WO 1987/007655 (17.12.1987 Gazette 1987/28)
(84) Designated Contracting States:
DE FR GB IT NL

(30) Priority: 02.06.1986 US 19860870202

(71) Applicant: HUGHES AIRCRAFT COMPANY
Los Angeles, California 90502 (US)

(72) Inventors:
  • PASTOR, Ricardo, C.
    Manhattan Beach, CA 90266 (US)
  • GORRE, Luisa, E.
    Oxnard, CA 93033 (US)

(74) Representative: KUHNEN, WACKER & PARTNER 
Patent- und Rechtsanwaltsbüro, Alois-Steineckerstrasse 22
D-85354 Freising
D-85354 Freising (DE)

   


(54) PROCESS FOR PREPARING SINGLE CRYSTAL BINARY METAL OXIDES OF IMPROVED PURITY